1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c6128e2ffe398a19b6dd9f4fbac158fb379717d8a4c9728de80b3728769dd2. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d74af1af-56d7-448b-802b-1e760e6494c4.json and https://artists.proofprofile.net/proofs/artist/d74af1af-56d7-448b-802b-1e760e6494c4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Brandenburg Concerto No. 1 in F Major, BWV 1046: I. [Allegro] - Recorded 1964
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90f931916a243181651ef1f78369ebf764b9f76ce80db162b5a706cf75f9274. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056400071.
Brandenburg Concerto No. 1 in F Major, BWV 1046: II. Adagio - Recorded 1964
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc626686e57ecab5a07cb67b67b29146954ceb8b5488e338b6695c3b54116ab9e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056400072.
Brandenburg Concerto No. 1 in F Major, BWV 1046: III. Allegro - Recorded 1964
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ead0877965ad591bd979f54994f956dbf9b192b84e1597d4317c165d03f5513. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056400073.
Brandenburg Concerto No. 1 in F Major, BWV 1046: I. [Allegro]
Bach, J.S.: Brandenburg Concertos Nos.1-3; Overture No.3
Brandenburg Concerto No. 1 in F Major, BWV 1046: IV. Menuetto – Trio I – Polacca – Trio II - Recorded 1964
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c04e000365a34680ed85f047f1f1c548423fed3115aa95cb87153f79e5a4cb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056400074.
Brandenburg Concerto No. 1 in F Major, BWV 1046: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc626686e57ecab5a07cb67b67b29146954ceb8b5488e338b6695c3b54116ab9e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056400072.
Brandenburg Concerto No. 1 in F Major, BWV 1046: III. Allegro
Brandenburg Concerto No. 1 in F Major, BWV 1046: IV. Menuetto – Trio I – Polacca – Trio II
Bach, J.S.: The Brandenburg Concertos; Suites Nos.2 & 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90f931916a243181651ef1f78369ebf764b9f76ce80db162b5a706cf75f9274. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc626686e57ecab5a07cb67b67b29146954ceb8b5488e338b6695c3b54116ab9e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ead0877965ad591bd979f54994f956dbf9b192b84e1597d4317c165d03f5513. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c04e000365a34680ed85f047f1f1c548423fed3115aa95cb87153f79e5a4cb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056400074.